Kotatsu futon The kotatsu futon is a thick blanket, similar to a quilt, under which you can sit and enjoy the warmth of the kotatsu. Some people prefer to buy multiple futons with their kotatsu, because this allows them to wash the futon in case it has gotten dirty. When buying a kotatsu futon always make sure that its size actually fits your table, as well as your own personal preferences. The price of the futon can vary significantly, and usually depends on the quality and fabrication method of the blanket. In Japan some very expensive traditionally hand made futons can be bought, but these tend to be rare in the United States. Please note that a shikibuton, which is generally used to sleep on, is not the same kind of futon as needed for the kotatsu!
The kotatsu is mainly used in Japan, and Japanese culture is very different from Western culture. In Japan it is not unusual to sit on the ground for extended periods of time. As a result, Japanese people have gotten very used to this. Me and most of my Western friends however, got pretty uncomfortable after sitting on the floor with our legs crossed for over 20 minutes. Kotatsu Even though I have gotten used to sitting on the floor, it is still hard for me to spend extended periods sitting on a hard surface. When using my kotatsu table I always make sure I have some extra pillows or futtons to sit on to relieve this pain. However, since kotatsu tables sometimes are pretty low, please make sure that there is enough space for you to sit under when using an extra pillow for comfort.
Another option that you can consider is to purchase a zaisu along with your kotatsu. A zaisu is a typical Japanese floor chair that provides you with a backrest, while sitting on the floor!
Another important thing to check when buying a kotatsu table is the voltage and plug that the kotatsu you buy requires. Since some of the kotatsu tables that can be bought online are shipped from other countries, these do not necessarily match the ones in your country. Both Japan and the U.S. use a voltage of 120V, and they also use the same plug. However some other countries might use a higher voltage. (Some countries use a voltage of around 230V or 240V, and the frequency of the current can also vary!) This is an important thing to check! Most electrical devices can handle a voltage lower than intended, but this does not work the other way around. One of my friends brought a television set home from Japan, only to see it burn out once plugged in.